1.

A tower leans towards west making an angle alpha with the vertical. The angular elevation of B, the top most point of the tower is beta as observed from a point C due east of A at distance d from A. If the angular elevation of B from a point due east of C a distance 2d from C isgamma , " then " 2tan alpha can be written as

Answer»

`3cotbeta-2cot GAMMA`
`3COT gamma-2cotbeta`
`3cotbeta-cot gamma`
`cotbeta-3cot gamma`

ANSWER :C


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